Door operating mechanism



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DOOR OPERATING MECHANISM Filed July 24, 1945 (fp 11H Patented May l5,1951 UNITED STATES PATENT GFFICE 1 Claim. 1 My present invention, in itsbroad aspect has to do with improvements in door operating mechanisms.and is especially indicated for opening and closing exceptionally heavyand cumbersome doors which are ordinarily beyond one mans strength tooperate, such for instance, as ships cargo doors, and the like. Mydevice is designed to build up the necessary leverage for operating thedoor with ease through the provision of an improved cable arrangementand winch or sheave operating mechanism which may be conveniently andeasily operated by one man. My device may be made in any size desiredfor the work to be accomplished, and is simple, practical, andefficient, and has no parts which are likely to get out of order orbecome broken or deranged.

Other and equally important objects and advantages of my invention willbe apparent from the following description and drawings, but it ispointed out that changes in form, size, shape, materials, andconstruction and arrangement of parts may be made and are contemplatedwithin the purview of my broad inventive concept, and the scope of theappended claim. i

In the drawings, wherein I have illustrated a preferred form of myinvention- ,Y

Figure 1 is an elevation showing my device applied to a sliding door.;

Figure 2 is an end view;

Figure 3 is a section on the line 3-3 of Figure 1;

Figure 4 is a section on the line 4-4 of Figure 1, and

Figure 5 is a. view of one of the cable turnbuckles.

In the drawings, wherein like characters of reference are used todesignate like or similar parts:

The numeral I designates a sliding door, which is suspended from rollers2 from an overhead track 3, and covers the door opening 4 in thebuilding or other object 5. My two cable ends 6 and 'I are attached asat B to the building wall 5, or the like on either side of the door, andhave turnbuckles 9-see Figure 5-for creating the proper tension. Theseturnbuckles have the usual bodies I into which are threaded the rods Il,having eyes I2, one connected to an eye I3 or the like, and the other tothe cable terminal eye I4. In spaced relation, at about the middle ofthe door, are two sheaves I and I6 over which the cable ends 6 and I aretrained. The sheavessee Figure 3--each has a base plate I'I which may bewelded as at I8 to the door, a hood I9, a pin 20, and a grooved roller2| rotatable on the pin. The pin is locked as at 22 by a threaded stud.

The cable ends are then led down and lead into the cables on the winch23--see Fig. 4-the hollow hub 24 of which is welded as at 25 to thedoor, and over which fits the sheave part which has a sleeve 26 weldedto the face plate 21. To the face plate 21 is bolted as at 28 theoperating handle 29, the head of the bolt being connected by weldingthrough a member positioned behind the bolt head, shown in Figure 4, tothe inner surface of the hub 24. By these means sufcient leverage isimparted to slide the door with ease, irrespective of its Weight andmannerisms.

From the foregoing it is believed that the operation and advantages ofmy invention will be apparent, but it is again pointed out thatinterpretation of the scope of my invention should only be conclusivewhen made in the light of the subjoined claim.'

I claim:

A mechanism for opening or closing a door slidably mounted on a wall inwhich the door opening is located comprising a drum journaled on thedoor below the horizontal center of the door and on the vertical centerof the door, a pair of spaced idler pulleys mounted on the door atopposite sides of said vertical center, a cable extended several timesaround the drum, upwardly from the drum over the said idler pulleys andextended horizontally from the said pulleys to points spaced from theedges of the said dooropening, and means securing the ends of the cableto the said wall in which the door opening is positioned with the cableclose to the upper edge of the wall to provide head room forunobstructed passage through the said door opening, said means includingturnbuckles in the ends of the cable for providing suiicient tension inthe cable to insure travel of the door as the drum is rotated.

STEPHEN HENRY CASEY, SR.

REFERENCES CITED The following references are of record in the le 0fthis patent:

UNITED STATES PATENTS Number Name Date 343,190 McCarthy June 8, 1886.360,297 Hess Mar. 29, 1887 548,856 Thorn Oct. 29, 1895 1,478,326 DooleyDec. 18, 1923 2,209,467 Moore July 30, 1940 2,293,658 Morgan Aug. 18,1942 2,353,217 Brown July 11, 1944

